How many letters does the top answer for “an order of helminths, including the nematoidea and gordiacea; the roundworms.” have?

The most common answer is nematelminthes (14 letters).

Crossword clue: an order of helminths, including the nematoidea and gordiacea; the roundworms.

nematelminthes, nemathelminthes.

2 answers found in Letterora's clue database (Wikidata facts, Open Trivia DB, WordNet and Webster definitions — all licensed sources).

nematelminthes 14 letters web-def

An order of helminths, including the Nematoidea and Gordiacea; the roundworms. [Written also Nematelminthea.]

nemathelminthes 15 letters web-def

An order of helminths, including the Nematoidea and Gordiacea; the roundworms. [Written also Nematelminthea.]